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Check Digit

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Check Digit - definition(s)

Check Digit - A digit computed from analysis of a group of numbers on a given record which calculates to prove that the figures are correct. Nine-digit zip codes have no check digit. To utilize nine-digit for bar coded mail, however, a check digit is mandatory. (In this way, the major share of nine-digit mail now includes a check digit.)

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Source: Postcom, 17 February 2010 08:06:02, External






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